motor

Abstract

To inhibit a torque ripple from deteriorating.SOLUTION: A motor 10 comprises a stator 14 having a stator core 26. The stator 14 comprises a coil connection body 46U of one phase having a plurality of coils 16 connected to each other, the plurality of coils 16 including at least one coil 16 having electric resistance set so as to differ from electric resistance of the other coils 16. The stator 14 also comprises coil connection bodies 46V, 46W of other phases, each of which has a plurality of coils 16 connected to each other, the plurality of coils 16 including at least one coil 16 having electric resistance set so as to differ from electric resistance of the other coils and has combined resistance set so as to be the same as combined resistance of the coil connection body 46U of the one phase.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a motor. [Background technology]

[0002] Patent Document 1 below discloses a motor configured by arranging multiple coils around an annular fixed ring. The motor described in this document is configured by winding a wire in a rectangular shape and bending both axial ends radially to form A-phase coils and B-phase coils, which are arranged alternately around the circumferential direction of the fixed ring. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 4-58747 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in a motor in which the combined resistance of the multiple coils constituting one phase differs from the combined resistance of the multiple coils constituting the other phases, the difference in the combined resistance of each phase may cause an electrical imbalance, worsening torque ripple; however, the configuration described in Patent Document 1 does not take this into consideration.

[0005] In consideration of the above, the present disclosure has an object to provide a motor that can suppress deterioration of torque ripple. [Means for solving the problem]

[0006] The motor (10, 50, 51, 54, 56, 64, 66, 68, 84, 86) that solves the above problem includes a rotor (12) that has a magnet (18) and is rotatably supported, a core (26) that is formed in an annular shape and that is arranged coaxially with the rotor, and a plurality of coils (16) that are each formed by winding a conductive winding (30) in an annular shape and that are connected to each other, and at least one of the plurality of coils First The electric resistance of a coil is set to be different from the electric resistance of the other coils, and the plurality of coils are arranged along the core and facing the magnet. The coil connection body (46U) of one phase has a plurality of coils each formed by winding a conductive winding in an annular shape and connected to each other, and at least one of the plurality of coils has First a coil connected body of another phase (46V, 46W) in which the electrical resistance of the coil is set to be different from the electrical resistance of the other coils, the plurality of coils being arranged facing the magnet and along the core, and the combined resistance is set to be the same as the combined resistance of the coil connected body of the one phase; The coil has an opposing portion (36) in which the windings are arranged side by side in the circumferential direction and which is arranged radially opposite the axial center of the magnet, and coil end portions (38) which respectively form portions on one axial side and the other axial side of the opposing portion, and the coil end portion of one of the coils and the coil end portion of another of the coils, which have different electrical resistances, are arranged overlapping each other, and an insulator (28) is attached to the core to separate the core from the multiple coils, and the insulator has an inner surface covering portion (28A) which covers the radially inner surface of the core, and a pair of axial end surface covering portions (2 8B), and a pair of outer circumferential flange portions (28C) extending in the axial direction from radially outer ends of the pair of axial end surface covering portions, and each of the outer circumferential flange portions is provided with a circumferential positioning portion (28E, 28F) that is formed in a convex shape toward the inside in the radial direction and that circumferentially contacts a coil end portion of one of the plurality of coils to position the one coil, and an axial positioning portion (28G, 28H) that is formed in a convex shape toward the inside in the radial direction and that axially contacts a coil end portion of another of the plurality of coils to position the other coil in the axial direction.

[0007] By configuring in this way, it is possible to prevent the torque ripple from becoming worse. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a partially sectional perspective view showing a rotor and a stator of a motor according to a first embodiment. FIG. [Figure 2] FIG. 2 is a side cross-sectional view showing a cross section of the motor taken along the axial direction. [Figure 3] FIG. 2 is a plan view showing a stator and a rotor. [Figure 4] FIG. 2 is a cross-sectional view showing a stator and a rotor. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8]FIG. 4 is an enlarged plan view showing the boundary between the opposing portion and the coil end portion. [Figure 9] FIG. 4 is an enlarged side cross-sectional view showing the boundary between the opposing portion and the coil end portion. [Figure 10] FIG. 2 is a schematic diagram for explaining the connections of U-phase, V-phase, and W-phase. [Figure 11] FIG. 2 is a schematic diagram for explaining the connections and arrangement of U-phase, V-phase, and W-phase wires. [Figure 12] FIG. 2 is a side cross-sectional view showing a cross section of a part of the stator taken along the axial direction. [Figure 13] FIG. 2 is a perspective view showing an insulator and a coil supported by a stator core via the insulator. [Figure 14] 14 is a perspective view showing an insulator and a coil supported by a stator core via the insulator, showing an example in which an insulator different from that in FIG. 13 is applied. [Figure 15] 3 is a perspective view showing an insulator and a U-phase coil, a V-phase coil, and a W-phase coil supported by a stator core via the insulator. FIG. [Figure 16] 10 is a schematic diagram for explaining the connections of the U-phase, V-phase, and W-phase of a motor according to a second embodiment. FIG. [Figure 17] 10 is a schematic diagram for explaining the connections and arrangement of U-phase, V-phase, and W-phase of a motor according to a second embodiment. FIG. [Figure 18] FIG. 10 is a schematic diagram for explaining the connections of the U-phase, V-phase, and W-phase of a motor according to a third embodiment. [Figure 19] 10 is a schematic diagram for explaining the connections and arrangement of U-phase, V-phase, and W-phase of a motor according to a third embodiment. FIG. [Figure 20] FIG. 10 is a schematic diagram for explaining the connections of the U-phase, V-phase, and W-phase of a motor according to a fourth embodiment. [Figure 21] FIG. 10 is a schematic diagram for explaining the connections and arrangement of U-phase, V-phase, and W-phase of a motor according to a fourth embodiment. [Figure 22] FIG. 11 is a schematic diagram for explaining the connections of the U-phase, V-phase, and W-phase of a motor according to a fifth embodiment. [Figure 23]FIG. 11 is a schematic diagram for explaining the connections and arrangement of U-phase, V-phase, and W-phase of a motor according to a fifth embodiment. [Figure 24] FIG. 13 is a schematic diagram for explaining the connections of the U-phase, V-phase, and W-phase of a motor according to a sixth embodiment. [Figure 25] FIG. 13 is a schematic diagram for explaining the connections and arrangement of U-phase, V-phase, and W-phase of a motor according to a sixth embodiment. [Figure 26] FIG. 13 is a schematic diagram for explaining the connections of the U-phase, V-phase, and W-phase of a motor according to a seventh embodiment. [Figure 27] FIG. 13 is a schematic diagram for explaining the connections and arrangement of the U-phase, V-phase, and W-phase of a motor according to a seventh embodiment. [Figure 28] FIG. 13 is a schematic diagram for explaining the connections of the U-phase, V-phase, and W-phase of a motor according to an eighth embodiment. [Figure 29] FIG. 13 is a schematic diagram for explaining the connections and arrangement of the U-phase, V-phase, and W-phase of a motor according to an eighth embodiment. [Figure 30] FIG. 13 is a perspective view showing an insulator of a motor according to a ninth embodiment. [Figure 31] FIG. 13 is a perspective view showing an insulator of a motor according to a ninth embodiment, and U-phase coils, V-phase coils, and W-phase coils supported by a stator core via the insulator. [Figure 32] FIG. 23 is an enlarged plan view showing a part of the motor according to the tenth embodiment. [Figure 33] FIG. 23 is an enlarged plan view showing a part of the motor according to the eleventh embodiment. [Figure 34A] FIG. 23 is an enlarged plan view showing a part of the motor according to the twelfth embodiment. [Figure 34B] FIG. 23 is an enlarged plan view showing a part of the motor according to the thirteenth embodiment. [Figure 35] FIG. 23 is an enlarged plan view showing a part of the motor according to the fourteenth embodiment. [Figure 36] FIG. 22 is a schematic diagram showing a rotor and a stator of a motor according to a fifteenth embodiment. [Figure 37] FIG. 22 is a schematic diagram showing a rotor and a stator of a motor according to a sixteenth embodiment. [Figure 38] 10A and 10B are side cross-sectional views illustrating variations in bending of the coil end portion. [Figure 39] 10A and 10B are side cross-sectional views illustrating variations in bending of the coil end portion. [Figure 40] 10A and 10B are side cross-sectional views illustrating variations in bending of the coil end portion. [Figure 41] 10A and 10B are side cross-sectional views illustrating variations in bending of the coil end portion. [Figure 42] 4A and 4B are diagrams for explaining the positional relationship between a coil end portion and a magnet. [Figure 43] 10A and 10B are side cross-sectional views illustrating variations in bending of the coil end portion. [Figure 44] 10A and 10B are side cross-sectional views illustrating variations in bending of the coil end portion. [Figure 45] 10A and 10B are enlarged perspective views illustrating variations of the terminal portions of the windings that form the coil. [Figure 46] 10A and 10B are enlarged perspective views illustrating variations of the terminal portions of the windings that form the coil. [Figure 47] 10A and 10B are enlarged perspective views illustrating variations of the terminal portions of the windings that form the coil. DETAILED DESCRIPTION OF THE INVENTION

[0009] (First embodiment) A motor 10 according to a first embodiment of the present disclosure will be described using Figures 1 to 15. Note that the arrow Z direction, arrow R direction, and arrow C direction shown as appropriate in the figures respectively indicate one side in the rotational axis direction, the outer side in the rotational radial direction, and one side in the rotational circumferential direction of a rotor 12, which will be described later. Furthermore, hereinafter, when simply referring to an axial direction, a radial direction, or a circumferential direction, this refers to the rotational axis direction, rotational radial direction, or rotational circumferential direction of the rotor 12, unless otherwise specified.

[0010] 1 to 3, motor 10 of this embodiment is an inner rotor brushless motor in which rotor 12 as a rotating body is disposed radially inside stator 14. Note that the drawings shown in FIGS. 1 to 5 are drawings of motor 10 etc. shown as an example, and there are some parts where the number of coils 16 and the number of magnets 18 do not match those described below.

[0011] The rotor 12 is composed of a rotating shaft 22 rotatably supported via a pair of bearings 20, a rotor core 24 formed in a bolt-like cylindrical shape and fixed to the rotating shaft 22, and a plurality of magnets 18 fixed to the radially outer surface of the rotor core 24.

[0012] The rotor core 24 includes a cylindrical first cylindrical portion 24A to which the rotating shaft 22 is fixed by press-fitting or the like, a cylindrical second cylindrical portion 24B disposed radially outward of the first cylindrical portion 24A, and a disc-shaped connecting plate portion 24C that radially connects one axial end of the first cylindrical portion 24A to one axial end of the second cylindrical portion 24B. The outer peripheral surface, which is the radially outer surface of the second cylindrical portion 24B, is formed into a cylindrical surface along the circumferential direction. A magnet 18, which will be described later, is fixed to the outer peripheral surface of the second cylindrical portion 24B.

[0013] The magnets 18 are formed using a magnetic compound having an intrinsic coercivity Hc of 400 kA / m or more and a residual magnetic flux density Br of 1.0 T or more. As an example, the magnets 18 of this embodiment are made of NdFe 11 TiN, Nd2Fe 14 B, SmFe 17 The rotor core 24 is formed using a magnetic compound such as N3 or FeNi. A plurality of magnets 18 are fixed to the outer peripheral surface of the second cylindrical portion 24B of the rotor core 24. The magnets 18 whose radially outer surfaces are N poles and the magnets 18 whose radially outer surfaces are S poles are arranged alternately in the circumferential direction. The number of magnets 18 may be set appropriately taking into consideration the output required of the motor 10, etc.

[0014] 5, the stator 14 includes a stator core 26 as a core formed in an annular shape, an insulator 28 attached to the stator core 26 by adhesive bonding, fitting, or the like, and a plurality of coils 16 attached to the stator core 26 via the insulators 28. The stator 14 of this embodiment has a teethless structure in which no part of the stator core 26 is disposed inside the coils 16.

[0015] 1 and 5, the stator core 26 is formed in an annular shape using a magnetic material such as steel. Furthermore, a cross section of the stator core 26 cut along the axial and radial directions has a rectangular cross section with the axial direction as the longitudinal direction. Furthermore, the radial thickness of the stator core 26 is set to be larger than the radial dimension of coil end portions 38 of the coils 16, which will be described later. The stator core 26 is disposed coaxially with the rotor 12, and the axial center position of the stator core 26 and the axial center position of the multiple magnets 18 fixed to the rotor core 24 coincide with each other in the axial direction.

[0016] The insulator 28 is made of a highly insulating material such as a resin material. The insulator 28 covers the radially inner surface and both axial end surfaces of the stator core 26 when the insulator 28 is attached to the stator core 26. The specific configuration of the insulator 28 will be described in detail later.

[0017] As shown in FIGS. 5 to 7, the multiple coils 16 are formed by winding conductive wires (conductor wires) in a circular shape. Here, as shown in FIGS. 6 and 7, the windings 30 forming the coils 16 of this embodiment have a rectangular cross section in a longitudinal cross section, in which the dimension L1 of the windings 30 in a first direction (arrow A1 direction) is larger than the dimension L2 of the windings 30 in a second direction (arrow A2) perpendicular to the first direction. The windings 30 may also be a wire assembly formed by bundling conductive wires. The resistance between the bundled wires is greater than the resistance of the wires themselves. The cross-sectional shape of the windings 30 may be oval or elliptical. Generally, enameled wires are preferably used for the windings 30, and the conductive material may be copper or aluminum.

[0018] As shown in Figures 5 to 7, the stator 14 of this embodiment is configured to include two types of coils 16 with different axial dimensions. Here, the coils 16 shown in Figure 6 are referred to as short coils 32. The coils 16 shown in Figure 7 are referred to as long coils 34. The number of coils 16 may be set appropriately taking into consideration the output required of the motor 10, etc.

[0019] As shown in Fig. 6, the short coil 32 is formed by winding the wire 30 in a rectangular shape so as to be stacked in the second direction (the direction of arrow A2), and then bending both axial ends radially outward. As a result, the short coil 32 has a pair of opposing portions 36 in which parts of the wire 30 are arranged side by side in the circumferential direction and spaced apart in the circumferential direction, one coil end portion 38 circumferentially connecting ends on one axial side of the pair of opposing portions 36, and the other coil end portion 38 circumferentially connecting ends on the other axial side of the pair of opposing portions 36. Furthermore, a terminal portion 40 on one side of the wire 30 forming the short coil 32 extends from one circumferential side of the opposing portion 36 on one circumferential side toward one axial side. Furthermore, a terminal portion 40 on the other side of the wire 30 forming the short coil 32 extends from one circumferential side of the opposing portion 36 on the other circumferential side toward one axial side. By routing the terminal portion 40 in this manner, in the short coil 32 of this embodiment, the number of laminations of the winding 30 at the coil end portion 38 on one axial side is smaller than the number of laminations of the winding 30 at the coil end portion 38 on the other axial side. More specifically, the number of laminations of the winding 30 at the coil end portion 38 on one axial side is six, and the number of laminations of the winding 30 at the coil end portion 38 on the other axial side is seven. The number of laminations of the winding 30 at the pair of opposing portions 36 is seven.

[0020] Here, a brief description will be given of the manufacturing process of the short coil 32. In the manufacturing process of the short coil 32, first, the winding 30 is wound in a rectangular shape so that the winding 30 is stacked in the second direction (the direction of arrow A2). Next, the rectangularly wound portion of the short coil 32, excluding the pair of terminal portions 40, is joined using a joining member (not shown). As a result, the portions of the short coil 32 that form the pair of opposing portions 36, the coil end portions 38 on one axial side, and the coil end portions 38 on the other axial side (the stacked winding 30) are joined inseparably in the second direction. Next, as shown in FIGS. 8 and 9 , the portions of the short coil 32 that form the coil end portions 38 on one axial side and the coil end portions 38 on the other axial side are bent radially outward at approximately right angles. In other words, the boundaries between the pair of coil end portions 38 and the pair of opposing portions 36 are bent in the first direction at approximately right angles. This forms the short coil 32 in which the pair of opposing portions 36 are arranged along the radially inner surface of the stator core 26 and both coil end portions 38 on one axial side and the other axial side are arranged along both axial end surfaces of the stator core 26. The short coil 32 is manufactured through the above steps.

[0021] 6 and 7, the long coil 34 has the same configuration as the short coil 32, except that the axial dimension H2 of the long coil 34 is larger than the axial dimension H1 of the short coil 32. Here, the parts of the long coil 34 that correspond to the short coil 32 are given the same reference numerals as the short coil 32, and a description of these parts will be omitted. The long coil 34 is manufactured through the same process as the short coil 32. The length of the winding 30 that forms the long coil 34 is longer than the length of the winding 30 that forms the short coil 32. As a result, the electrical resistance of the long coil 34 is higher than the electrical resistance of the short coil 32.

[0022] As shown in FIG. 10 , the multiple coils 16 are connected in a star configuration, for example. In this example, the U-phase 42U, V-phase 42V, and W-phase 42W each include two short coils 32 and two long coils 34. In the U-phase 42U, these four coils 16 are connected in series in the following order from the neutral point 44: long coil 34, short coil 32, long coil 34, short coil 32. In the V-phase 42V, these four coils 16 are connected in series in the following order from the neutral point 44: long coil 34, short coil 32, long coil 34, short coil 32. In the W-phase 42W, these four coils 16 are connected in series in the following order from the neutral point 44: short coil 32, long coil 34, short coil 32, long coil 34. The coils 16 may be connected to each other using a connecting member such as a bus bar, or the coils 16 may be wound continuously with the same winding 30 without being cut from each other.

[0023] Here, in the U-phase 42U, the range extending from the short coil 32 farthest from the neutral point 44 to the neutral point 44 is referred to as the U-phase coil connection body 46U. In addition, in the V-phase 42V, the range extending from the short coil 32 farthest from the neutral point 44 to the neutral point 44 is referred to as the V-phase coil connection body 46V. Furthermore, in the W-phase 42W, the range extending from the long coil 34 farthest from the neutral point 44 to the neutral point 44 is referred to as the W-phase coil connection body 46W. In this embodiment, the number of long coils 34 and the number of short coils 32 are set to be the same in the coil connection bodies 46U, 46V, and 46W of each phase, so that the combined resistances of the coil connection bodies 46U, 46V, and 46W of each phase are the same. Here, the combined resistance of the coil connectors 46U, 46V, and 46W of each phase being the same means that the difference between the combined resistance of the coil connector 46U of one phase and the combined resistance of the coil connectors 46V and 46W of the other phases is within plus or minus 5%.

[0024] 11 shows the relative positions of the coils 16 in the U-phase 42U, the coils 16 in the V-phase 42V, and the coils 16 in the W-phase 42W. As shown in Fig. 11 and Fig. 12, the short coil 32 farthest from the neutral point 44 in the U-phase 42U and the short coil 32 farthest from the neutral point 44 in the V-phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 farthest from the neutral point 44 in the W-phase 42W is arranged so as to straddle the short coil 32 farthest from the neutral point 44 in the U-phase 42U and the short coil 32 farthest from the neutral point 44 in the V-phase 42V.

[0025] Furthermore, the short coil 32 farthest from the neutral point 44 in the V-phase 42V and the short coil 32 on the opposite side of the neutral point 44 in the W-phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 on the opposite side of the neutral point 44 in the U-phase 42U is arranged so as to straddle the short coil 32 farthest from the neutral point 44 in the V-phase 42V and the short coil 32 on the opposite side of the neutral point 44 in the W-phase 42W.

[0026] In addition, the short coil 32 on the opposite side of the neutral point 44 in the W phase 42W and the short coil 32 on the neutral point 44 side in the U phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 on the opposite side of the neutral point 44 in the V phase 42V is arranged so as to straddle the short coil 32 on the opposite side of the neutral point 44 in the W phase 42W and the short coil 32 on the neutral point 44 side in the U phase 42U.

[0027] In addition, the short coil 32 on the neutral point 44 side in the U phase 42U and the short coil 32 on the neutral point 44 side in the V phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 on the neutral point 44 side in the W phase 42W is arranged so as to straddle the short coil 32 on the neutral point 44 side in the U phase 42U and the short coil 32 on the neutral point 44 side in the V phase 42V.

[0028] In addition, the short coil 32 on the neutral point 44 side in the V phase 42V and the short coil 32 on the neutral point 44 side in the W phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 on the neutral point 44 side in the U phase 42U is arranged so as to straddle the short coil 32 on the neutral point 44 side in the V phase 42V and the short coil 32 on the neutral point 44 side in the W phase 42W.

[0029] In addition, the short coil 32 on the neutral point 44 side in the W phase 42W and the short coil 32 farthest from the neutral point 44 in the U phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 on the neutral point 44 side in the V phase 42V is arranged so as to straddle the short coil 32 on the neutral point 44 side in the W phase 42W and the short coil 32 farthest from the neutral point 44 in the U phase 42U.

[0030] 12 and 13 , the insulator 28 to which each coil 16 is attached includes an inner surface covering portion 28A covering the radially inner surface of the stator core 26, a pair of axial end surface covering portions 28B covering both axial end surfaces of the stator core 26, and a pair of outer flange portions 28C extending axially from radially outer ends of the pair of axial end surface covering portions 28B. The insulator 28 also includes a plurality of circumferential positioning portions 28D for circumferentially positioning the short coils 32. The plurality of circumferential positioning portions 28D are formed in a convex shape extending radially inward from the outer flange portion 28C and are arranged at equal intervals along the circumferential direction. The coil end portions 38 of the short coils 32 are arranged between a pair of circumferential positioning portions 28D adjacent to each other in the circumferential direction, thereby positioning the short coils 32 circumferentially. The multiple circumferential positioning portions 28D may be provided on one outer peripheral flange portion 28C, but may be provided on both outer peripheral flange portions 28C. Also, as shown in Fig. 14, the portion corresponding to the inner surface covering portion 28A may be a sheet-like paper insulator, and the other portion may be an insulator 29 having a configuration similar to the insulator 28 shown in Fig. 13. The portions of the insulator 29 shown in Fig. 14 that correspond to the insulator 28 shown in Fig. 13 are denoted by the same reference numerals as the portions corresponding to the insulator 28.

[0031] 11 , 12 , and 15 , the opposing portions 36 of the short coils 32 and the opposing portions 36 of the long coils 34 are arranged along the radially inner surface of the stator core 26 via the inner covering portion 28A of the insulator 28, and are arranged at the same radial position. Specifically, in the state shown in FIG. 15 , the opposing portions 36 on one circumferential side of the U-phase short coil 32 and the opposing portions 36 on the other circumferential side of the V-phase short coil 32, which are adjacent in the circumferential direction, are arranged adjacent to each other in the circumferential direction, and the opposing portions 36 on one circumferential side of the U-phase short coil 32 and the opposing portions 36 on the other circumferential side of the V-phase short coil 32, which are adjacent in the circumferential direction, are arranged between a pair of opposing portions 36 of the W-phase long coil 34. As shown in FIGS. 11 and 15 , the opposing portions 36 of the other short coils 32 and the opposing portions 36 of the other long coils 34 are also arranged along the radially inner surface of the stator core 26 in a similar relationship. Furthermore, with the axial center positions of the opposing portions 36 of the short coil 32 and the long coil 34 and the axial center position of the magnet 18 aligned with each other in the axial direction, the opposing portions 36 of the short coil 32 and the long coil 34 and the magnet 18 are arranged facing each other in the radial direction. Furthermore, the first direction of the windings 30 constituting the opposing portions 36 of the short coil 32 and the long coil 34 is directed towards the magnet 18.

[0032] 11, 12, and 15, the pair of coil end portions 38 of the short coil 32 are respectively arranged along both axial end surfaces of the stator core 26 via the pair of axial end surface covering portions 28B of the insulator 28. Furthermore, the pair of coil end portions 38 of the long coil 34 are respectively arranged along both axial end surfaces of the stator core 26 via the coil end portions 38 of two circumferentially adjacent short coils 32 and the pair of axial end surface covering portions 28B of the insulator 28. That is, the pair of coil end portions 38 of the long coil 34 are arranged to overlap in the axial direction with the pair of coil end portions 38 of two circumferentially adjacent short coils 32. More specifically, in the state shown in FIG. 15, the pair of coil end portions 38 of the W-phase long coil 34 are arranged to overlap in the axial direction with one circumferential side portion of the pair of coil end portions 38 of the circumferentially adjacent U-phase short coil 32 and the other circumferential side portion of the pair of coil end portions 38 of the V-phase short coil 32. As shown in FIGS. 11 and 15, the coil end portions 38 of the other short coils 32 and the coil end portions 38 of the other long coils 34 are also arranged along both axial end surfaces of the stator core 26 in a similar relationship.

[0033] (Actions and Effects of This Embodiment) Next, the operation and effects of this embodiment will be described.

[0034] 3, 6, 7, 10, and 11, in the motor 10 of this embodiment, switching the energization of the U-phase coil connection body 46U, the V-phase coil connection body 46V, and the W-phase coil connection body 46W, which constitute part of the stator 14, generates a rotating magnetic field on the inner periphery of the stator 14. This causes the rotor 12 to rotate.

[0035] In the motor 10 of this embodiment, the number of long coils 34 and the number of short coils 32 in each of the coil connections 46U, 46V, and 46W of each phase are set to be the same, so that the combined resistance of the coil connections 46U, 46V, and 46W of each phase is the same. This makes it less likely that electrical imbalance will occur among the coil connections 46U, 46V, and 46W of each phase. As a result, it is possible to prevent the torque ripple of the motor 10 from worsening.

[0036] Furthermore, in the motor 10 of this embodiment, the coil end portions 38 of the long coils 34 and the coil end portions 38 of the short coils 32 are configured to be bent radially outward at right angles relative to the opposing portions 36, and the coil end portions 38 of the long coils 34 and the coil end portions 38 of the short coils 32 are configured to overlap in the axial direction. This prevents the stator 14 from becoming larger in size in the axial direction. As a result, the motor 10 can be prevented from becoming larger in size in the axial direction.

[0037] Furthermore, in the motor 10 of this embodiment, the cross-sectional shape of the winding 30 forming the coil 16 is rectangular with its longitudinal direction aligned in the first direction (the direction of arrow A1). In addition, the first direction of the winding 30, which defines the opposing portions 36 of the short coils 32 and the long coils 34, faces the magnet 18. This allows the area of ​​the portion of the winding 30 facing the magnet 18 to be reduced while maintaining the cross-sectional area of ​​the winding 30. This prevents an increase in the electrical resistance of the winding 30 and prevents an increase in AC copper loss due to eddy currents generated in the opposing portions 36. Furthermore, in the motor 10 of this embodiment, the opposing portions 36 have a single-layer structure along the radially inner surface of the stator core 26. This makes it easier to form the opposing portions 36 in a curved shape corresponding to the radially inner surface of the stator core 26 when viewed from the axial direction, as shown in FIG. 8 . This improves the space factor.

[0038] 6, 7, 8, and 9, in the motor 10 of this embodiment, the portions of the coil 16 that form the pair of opposing portions 36, the coil end portion 38 on one axial side, and the coil end portion 38 on the other axial side (the laminated windings 30) are inseparably joined in the second direction during the manufacturing process of the coil 16. This improves the workability when bending the portions of the coil 16 that form the coil end portion 38 on one axial side and the coil end portion 38 on the other axial side at a substantially right angle radially outward.

[0039] Furthermore, in the motor 10 of this embodiment, the pair of terminal portions 40 are arranged on one axial side in a state in which the number of laminations of the winding 30 at the coil end portion 38 on one axial side of the coil 16 is smaller than the number of laminations of the winding 30 at the coil end portion 38 on the other axial side. With this configuration, the length of the portion of the coil 16 around which the winding 30 is wound can be shortened. This makes it possible to suppress an increase in the electrical resistance of the coil 16.

[0040] Furthermore, in the motor 10 of this embodiment, a plurality of circumferential positioning portions 28D are provided on the outer peripheral flange portion 28C of the insulator 28. This improves the workability when attaching the short coils 32 to the stator core 26 via the insulator 28. Furthermore, the circumferential position of each short coil 32 can be stabilized, and the short coils 32 can be more evenly arranged in the circumferential direction. Note that a configuration may be provided in which only circumferential positioning portions 28D are provided to position the short coils 32 of one phase in the circumferential direction.

[0041] (Motors of the second to eighth embodiments) Next, the configurations of stators 14 of motors according to second to eighth embodiments, which can suppress torque ripple in the same manner as motor 10 of the first embodiment, will be described using Figures 16 to 29. Note that members and parts of the motors according to second to eighth embodiments that correspond to those of the motors of the embodiments already described will be assigned the same reference numerals as those of the motors of the embodiments already described, and their description may be omitted.

[0042] (Motor of Second Embodiment) As shown in FIG. 16 , in the stator 14 of the motor of the second embodiment, the multiple coils 16 are connected in a star connection. The U-phase 42U, V-phase 42V, and W-phase 42W of this embodiment each include two short coils 32 and two long coils 34. In the U-phase 42U, two coils 16 connected in series from the neutral point 44 side, the short coil 32, and the long coil 34, are connected in parallel with two coils 16 connected in series from the neutral point 44 side, the short coil 32, and the long coil 34, respectively. In the V-phase 42V, two coils 16 connected in series from the neutral point 44 side, the short coil 32, and the long coil 34, respectively, are connected in parallel with two coils 16 connected in series from the neutral point 44 side, the short coil 32, and the long coil 34, respectively. Furthermore, in the W-phase 42W, two coils 16 connected in series from the neutral point 44 side, in the order of the long coil 34 and the short coil 32, and two coils 16 connected in series from the neutral point 44 side, in the order of the long coil 34 and the short coil 32, are connected in parallel. Also in this embodiment, the combined resistances of the coil connections 46U, 46V, 46W of each phase are the same.

[0043] 17, the short coil 32 of one wiring path in the U-phase 42U and the short coil 32 of one wiring path in the V-phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 of one wiring path in the W-phase 42W is arranged so as to straddle the short coil 32 of one wiring path in the U-phase 42U and the short coil 32 of one wiring path in the V-phase 42V.

[0044] Furthermore, the short coil 32 of one wiring path in the V-phase 42V and the short coil 32 of one wiring path in the W-phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 of one wiring path in the U-phase 42U is arranged so as to straddle the short coil 32 of one wiring path in the V-phase 42V and the short coil 32 of one wiring path in the W-phase 42W.

[0045] Furthermore, the short coil 32 of one wiring path in the W-phase 42W and the short coil 32 of the other wiring path in the U-phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 of one wiring path in the V-phase 42V is arranged so as to straddle the short coil 32 of one wiring path in the W-phase 42W and the short coil 32 of the other wiring path in the U-phase 42U.

[0046] Additionally, the short coil 32 of the other wiring path in the U-phase 42U and the short coil 32 of the other wiring path in the V-phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. Additionally, the long coil 34 of the other wiring path in the W-phase 42W is arranged so as to straddle the short coil 32 of the other wiring path in the U-phase 42U and the short coil 32 of the other wiring path in the V-phase 42V.

[0047] Additionally, the short coil 32 of the other wiring path in the V-phase 42V and the short coil 32 of the other wiring path in the W-phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26. Additionally, the long coil 34 of the other wiring path in the U-phase 42U is arranged so as to straddle the short coil 32 of the other wiring path in the V-phase 42V and the short coil 32 of the other wiring path in the W-phase 42W.

[0048] Additionally, the short coil 32 of the other wiring path in the W phase 42W and the short coil 32 of one wiring path in the U phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. Additionally, the long coil 34 of the other wiring path in the V phase 42V is arranged so as to straddle the short coil 32 of the other wiring path in the W phase 42W and the short coil 32 of one wiring path in the U phase 42U.

[0049] In the motor of the second embodiment configured to include the stator 14 described above, the deterioration of torque ripple can also be suppressed.

[0050] (Motor of the third embodiment) As shown in FIG. 18 , in the stator 14 of the motor of the third embodiment, the multiple coils 16 are connected in a star connection. The U-phase 42U, V-phase 42V, and W-phase 42W of this embodiment each include three short coils 32 and three long coils 34. In the U-phase 42U, three coils 16 connected in series from the neutral point 44 side in the order of short coil 32, long coil 34, and short coil 32 are connected in parallel with three coils 16 connected in series from the neutral point 44 side in the order of long coil 34, short coil 32, and long coil 34. In the V-phase 42V, three coils 16 connected in series from the neutral point 44 side in the order of short coil 32, long coil 34, and short coil 32 are connected in parallel with three coils 16 connected in series from the neutral point 44 side in the order of long coil 34, short coil 32, and long coil 34. Furthermore, in the W-phase 42W, three coils 16 connected in series in the order of long coil 34, short coil 32, and long coil 34 from the neutral point 44 side are connected in parallel with three coils 16 connected in series in the order of short coil 32, long coil 34, and short coil 32 from the neutral point 44 side. Also in this embodiment, the combined resistances of the coil connections 46U, 46V, and 46W of each phase are the same.

[0051] 19, the short coil 32 on one wiring path and on the opposite side of the neutral point 44 in the U phase 42U and the short coil 32 on one wiring path and on the opposite side of the neutral point 44 in the V phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 on one wiring path and on the opposite side of the neutral point 44 in the W phase 42W is arranged so as to straddle the short coil 32 on one wiring path and on the opposite side of the neutral point 44 in the U phase 42U and the short coil 32 on one wiring path and on the opposite side of the neutral point 44 in the V phase 42V.

[0052] In addition, the short coil 32 on one wiring path in the V-phase 42V and on the opposite side of the neutral point 44 and the short coil 32 on one wiring path in the W-phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 on one wiring path in the U-phase 42U is arranged so as to straddle the short coil 32 on one wiring path in the V-phase 42V and on the opposite side of the neutral point 44 and the short coil 32 on one wiring path in the W-phase 42W.

[0053] Furthermore, the short coil 32 of one wiring path in the W phase 42W and the short coil 32 of one wiring path and on the neutral point 44 side in the U phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 of one wiring path in the V phase 42V is arranged so as to straddle the short coil 32 of one wiring path in the W phase 42W and the short coil 32 of one wiring path and on the neutral point 44 side in the U phase 42U.

[0054] In addition, the short coil 32 on one wiring path and on the neutral point 44 side in the U phase 42U and the short coil 32 on one wiring path and on the neutral point 44 side in the V phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 on one wiring path and on the neutral point 44 side in the W phase 42W is arranged so as to straddle the short coil 32 on one wiring path and on the neutral point 44 side in the U phase 42U and the short coil 32 on one wiring path and on the neutral point 44 side in the V phase 42V.

[0055] In addition, the short coil 32 on one wiring path and on the neutral point 44 side in the V phase 42V and the short coil 32 on the other wiring path and on the opposite side of the neutral point 44 in the W phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 on the other wiring path and on the opposite side of the neutral point 44 in the U phase 42U is arranged so as to straddle the short coil 32 on one wiring path and on the neutral point 44 side in the V phase 42V and the short coil 32 on the other wiring path and on the opposite side of the neutral point 44 in the W phase 42W.

[0056] In addition, the short coil 32 of the other wiring path in the W phase 42W on the opposite side of the neutral point 44 and the short coil 32 of the other wiring path in the U phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 of the other wiring path in the V phase 42V on the opposite side of the neutral point 44 is arranged so as to straddle the short coil 32 of the other wiring path in the W phase 42W on the opposite side of the neutral point 44 and the short coil 32 of the other wiring path in the U phase 42U.

[0057] Additionally, the short coil 32 of the other wiring path in the U-phase 42U and the short coil 32 of the other wiring path in the V-phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. Additionally, the long coil 34 of the other wiring path in the W-phase 42W is arranged so as to straddle the short coil 32 of the other wiring path in the U-phase 42U and the short coil 32 of the other wiring path in the V-phase 42V.

[0058] Furthermore, the short coil 32 of the other wiring path in the V-phase 42V and the short coil 32 of the other wiring path on the neutral point 44 side in the W-phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 of the other wiring path on the neutral point 44 side in the U-phase 42U is arranged so as to straddle the short coil 32 of the other wiring path in the V-phase 42V and the short coil 32 of the other wiring path on the neutral point 44 side in the W-phase 42W.

[0059] In addition, the short coil 32 on the other wiring path and on the neutral point 44 side in the W phase 42W and the short coil 32 on one wiring path and on the opposite side of the neutral point 44 in the U phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 on the other wiring path and on the neutral point 44 side in the V phase 42V is arranged so as to straddle the short coil 32 on the other wiring path and on the neutral point 44 side in the W phase 42W and the short coil 32 on one wiring path and on the opposite side of the neutral point 44 in the U phase 42U.

[0060] In the motor of the third embodiment configured including the stator 14 described above, the deterioration of torque ripple can also be suppressed.

[0061] (Motor of Fourth Embodiment) As shown in FIG. 20 , in the stator 14 of the motor of the fourth embodiment, the multiple coils 16 are connected in a star connection. The U-phase 42U, V-phase 42V, and W-phase 42W of this embodiment each include one short coil 32, one long coil 34, and two medium coils 48. The medium coil 48 is a coil 16 whose axial dimension is set to be larger than the axial dimension of the short coil 32 and smaller than the axial dimension of the long coil 34. In the U-phase 42U, the four coils 16 are connected in series in the following order from the neutral point 44: the medium coil 48, the long coil 34, the medium coil 48, and the short coil 32. In the V-phase 42V, the four coils 16 are connected in series in the following order from the neutral point 44: the medium coil 48, the short coil 32, the medium coil 48, and the long coil 34. Furthermore, in the W-phase 42W, the four coils 16 are connected in series in the following order from the neutral point 44: long coil 34, middle coil 48, short coil 32, middle coil 48. Also in this embodiment, the combined resistances of the coil connections 46U, 46V, 46W of each phase are the same.

[0062] 21, the short coil 32 of the U-phase 42U and the long coil 34 of the V-phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the intermediate coil 48 on the opposite side of the neutral point 44 in the W-phase 42W is arranged so as to straddle the short coil 32 of the U-phase 42U and the long coil 34 of the V-phase 42V.

[0063] The long coil 34 of the V-phase 42V and the short coil 32 of the W-phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26. The intermediate coil 48 on the opposite side of the neutral point 44 in the U-phase 42U is arranged so as to straddle the long coil 34 of the V-phase 42V and the short coil 32 of the W-phase 42W.

[0064] The short coil 32 of the W-phase 42W and the long coil 34 of the U-phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. The intermediate coil 48 on the opposite side of the V-phase 42V from the neutral point 44 is arranged so as to straddle the short coil 32 of the W-phase 42W and the long coil 34 of the U-phase 42U.

[0065] The long coil 34 of the U-phase 42U and the short coil 32 of the V-phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the intermediate coil 48 on the neutral point 44 side of the W-phase 42W is arranged so as to straddle the long coil 34 of the U-phase 42U and the short coil 32 of the V-phase 42V.

[0066] The short coil 32 of the V-phase 42V and the long coil 34 of the W-phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26. In the U-phase 42U, the middle coil 48 on the neutral point 44 side is arranged so as to straddle the short coil 32 of the V-phase 42V and the long coil 34 of the W-phase 42W.

[0067] The long coil 34 of the W-phase 42W and the short coil 32 of the U-phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. The intermediate coil 48 on the neutral point 44 side of the V-phase 42V is arranged so as to straddle the long coil 34 of the W-phase 42W and the short coil 32 of the U-phase 42U.

[0068] In the motor of the fourth embodiment configured including the stator 14 described above, the deterioration of torque ripple can also be suppressed.

[0069] (Motor of the fifth embodiment) 22 and 23, a motor 50 of the fifth embodiment is a 10-pole, 12-slot, teethless motor. Note that the arrow i shown in the figures indicates the direction of current flowing from the W-phase 42W side to the V-phase 42V side.

[0070] As shown in FIG. 22 , in the stator 14 of the motor 50 of the fifth embodiment, the multiple coils 16 are connected in a star connection. The U-phase 42U, V-phase 42V, and W-phase 42W of this embodiment each include two short coils 32 and two long coils 34. In the U-phase 42U, these four coils 16 are connected in series in the following order from the neutral point 44: long coil 34, short coil 32, short coil 32, long coil 34. In the V-phase 42V, these four coils 16 are connected in series in the following order from the neutral point 44: long coil 34, short coil 32, short coil 32, long coil 34. In the W-phase 42W, these four coils 16 are connected in series in the following order from the neutral point 44: long coil 34, short coil 32, short coil 32, long coil 34. Also in this embodiment, the combined resistances of the coil connecting bodies 46U, 46V, and 46W of each phase are the same.

[0071] As shown in FIG. 23, the long coil 34 on the neutral point 44 side of the U phase 42U and the short coil 32 on the neutral point 44 side of the U phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26.

[0072] In addition, one of the opposing portions 36 of the long coil 34 on the opposite side of the neutral point 44 in the V phase 42V is disposed between the pair of opposing portions 36 of the short coil 32 on the neutral point 44 side in the U phase 42U.

[0073] Further, the long coil 34 on the opposite side of the neutral point 44 in the V-phase 42V and the short coil 32 on the opposite side of the neutral point 44 in the V-phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26.

[0074] Furthermore, one of the opposing portions 36 of the long coil 34 on the neutral point 44 side in the W phase 42W is disposed between the pair of opposing portions 36 of the short coil 32 on the neutral point 44 side in the V phase 42V.

[0075] Further, the long coil 34 on the neutral point 44 side of the W-phase 42W and the short coil 32 on the neutral point 44 side of the W-phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26.

[0076] In addition, one of the opposing portions 36 of the long coil 34 on the opposite side of the neutral point 44 in the U phase 42U is disposed between the pair of opposing portions 36 of the short coil 32 on the neutral point 44 side in the W phase 42W.

[0077] Further, the long coil 34 on the opposite side of the neutral point 44 in the U phase 42U and the short coil 32 on the opposite side of the neutral point 44 in the U phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26.

[0078] Furthermore, one of the opposing portions 36 of the long coil 34 on the neutral point 44 side in the V phase 42V is disposed between the pair of opposing portions 36 of the short coil 32 on the opposite side of the neutral point 44 in the U phase 42U.

[0079] Further, the long coil 34 on the neutral point 44 side in the V-phase 42V and the short coil 32 on the neutral point 44 side in the V-phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26.

[0080] In addition, one of the opposing portions 36 of the long coil 34 on the opposite side of the neutral point 44 in the W phase 42W is disposed between the pair of opposing portions 36 of the short coil 32 on the neutral point 44 side in the V phase 42V.

[0081] Further, the long coil 34 on the opposite side of the neutral point 44 in the W-phase 42W and the short coil 32 on the opposite side of the neutral point 44 in the W-phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26.

[0082] In addition, one of the opposing portions 36 of the long coil 34 on the neutral point 44 side in the U phase 42U is disposed between the pair of opposing portions 36 of the short coil 32 on the opposite side of the neutral point 44 in the W phase 42W.

[0083] The motor 50 of the fifth embodiment, which is configured to include the stator 14 described above, can also suppress deterioration of torque ripple.

[0084] (Motor of Sixth Embodiment) As shown in FIG. 24 , in the stator 14 of the motor of the sixth embodiment, half of the coils 16 are star-connected, and the remaining half are also star-connected. In this embodiment, the U-phase 42U, V-phase 42V, and W-phase 42W each include one short coil 32 and one long coil 34. In the U-phase 42U, the two coils 16 are connected in series from the neutral point 44 side, in the order of the long coil 34 and the short coil 32. In the V-phase 42V, the two coils 16 are connected in series from the neutral point 44 side, in the order of the long coil 34 and the short coil 32. In the W-phase 42W, the two coils 16 are connected in series from the neutral point 44 side, in the order of the short coil 32 and the long coil 34.

[0085] In this embodiment, the X-phase 42X, Y-phase 42Y, and Z-phase 42Z each include one short coil 32 and one long coil 34. In the X-phase 42X, the two coils 16 are connected in series from the neutral point 44 side, in the order of the long coil 34 and the short coil 32. In the Y-phase 42Y, the two coils 16 are connected in series from the neutral point 44 side, in the order of the long coil 34 and the short coil 32. In the Z-phase 42Z, the two coils 16 are connected in series from the neutral point 44 side, in the order of the short coil 32 and the long coil 34. Here, in the X-phase 42X, the range from the neutral point 44 to the short coil 32 is referred to as the X-phase coil connection body 46X. In the V-phase 42V, the range from the neutral point 44 to the short coil 32 is referred to as the Y-phase coil connection body 46Y. Furthermore, in Z-phase 42Z, the range from neutral point 44 to long coil 34 is referred to as Z-phase coil connection body 46Z. Also in this embodiment, the combined resistances of coil connection bodies 46U, 46V, 46W, 46X, 46Y, and 46Z of each phase are the same.

[0086] 25, the short coils 32 of the U-phase 42U and the short coils 32 of the V-phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 of the W-phase 42W is arranged so as to straddle the short coils 32 of the U-phase 42U and the short coils 32 of the V-phase 42V.

[0087] The V-phase 42V short coil 32 and the W-phase 42W short coil 32 are arranged adjacent to each other in the circumferential direction along the stator core 26. The U-phase 42U long coil 34 is arranged to straddle the V-phase 42V short coil 32 and the W-phase 42W short coil 32.

[0088] The W-phase 42W short coils 32 and the X-phase 42X short coils 32 are arranged adjacent to each other in the circumferential direction along the stator core 26. The V-phase 42V long coils 34 are arranged so as to straddle the W-phase 42W short coils 32 and the X-phase 42X short coils 32.

[0089] The short coils 32 of the X-phase 42X and the short coils 32 of the Y-phase 42Y are arranged adjacent to each other in the circumferential direction along the stator core 26. The long coils 34 of the Z-phase 42Z are arranged so as to straddle the short coils 32 of the X-phase 42X and the short coils 32 of the Y-phase 42Y.

[0090] The Y-phase 42Y short coils 32 and the Z-phase 42Z short coils 32 are arranged adjacent to each other in the circumferential direction along the stator core 26. The X-phase 42X long coils 34 are arranged to straddle the Y-phase 42Y short coils 32 and the Z-phase 42Z short coils 32.

[0091] The short coils 32 of the Z-phase 42Z and the short coils 32 of the U-phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. The long coils 34 of the Y-phase 42Y are arranged so as to straddle the short coils 32 of the Z-phase 42Z and the short coils 32 of the U-phase 42U.

[0092] Deterioration of torque ripple can also be suppressed in the motor of the sixth embodiment configured including the above-described stator 14. Note that U-phase 42U, V-phase 42V, W-phase 42W and X-phase 42X, Y-phase 42Y, and Z-phase 42Z may be connected to and driven by separate three-phase inverters, or U-phase 42U, V-phase 42V, W-phase 42W and X-phase 42X, Y-phase 42Y, and Z-phase 42Z may be bundled together and connected to a single three-phase inverter for driving.

[0093] (Motor of Seventh Embodiment) As shown in FIG. 26 , in the stator 14 of the motor of the seventh embodiment, half of the coils 16 are star-connected, and the remaining half are also star-connected. In this embodiment, the U-phase 42U, V-phase 42V, and W-phase 42W each include two short coils 32 or two long coils 34. In the U-phase 42U, these two coils 16 are connected in series in the order of short coil 32 and short coil 32 from the neutral point 44 side. In the V-phase 42V, these two coils 16 are connected in series in the order of short coil 32 and short coil 32 from the neutral point 44 side. Furthermore, in the W-phase 42W, these two coils 16 are connected in series in the order of long coil 34 and long coil 34 from the neutral point 44 side.

[0094] In addition, the X-phase 42X, Y-phase 42Y, and Z-phase 42Z of this embodiment are each configured to include two short coils 32 or two long coils 34. In the X-phase 42X, these two coils 16 are connected in series in the order of long coil 34 and long coil 34 from the neutral point 44 side. In the Y-phase 42Y, these two coils 16 are connected in series in the order of long coil 34 and long coil 34 from the neutral point 44 side. Furthermore, in the Z-phase 42Z, these two coils 16 are connected in series in the order of short coil 32 and short coil 32 from the neutral point 44 side.

[0095] 27, the short coil 32 on the opposite side of the neutral point 44 in the U phase 42U and the short coil 32 on the opposite side of the neutral point 44 in the V phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 on the neutral point 44 side in the W phase 42W is arranged so as to straddle the short coil 32 on the opposite side of the neutral point 44 in the U phase 42U and the short coil 32 on the opposite side of the neutral point 44 in the V phase 42V.

[0096] Furthermore, the short coil 32 on the opposite side of the neutral point 44 in the V phase 42V and the short coil 32 on the opposite side of the neutral point 44 in the Z phase 42Z are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 on the opposite side of the neutral point 44 in the X phase 42X is arranged so as to straddle the short coil 32 on the opposite side of the neutral point 44 in the V phase 42V and the short coil 32 on the opposite side of the neutral point 44 in the Z phase 42Z.

[0097] In addition, the short coil 32 on the opposite side of the neutral point 44 in the Z phase 42Z and the short coil 32 on the neutral point 44 side in the U phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 on the opposite side of the neutral point 44 in the Y phase 42Y is arranged so as to straddle the short coil 32 on the opposite side of the neutral point 44 in the Z phase 42Z and the short coil 32 on the neutral point 44 side in the U phase 42U.

[0098] In addition, the short coil 32 on the neutral point 44 side in the U phase 42U and the short coil 32 on the neutral point 44 side in the V phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 on the neutral point 44 side in the W phase 42W is arranged so as to straddle the short coil 32 on the neutral point 44 side in the U phase 42U and the short coil 32 on the neutral point 44 side in the V phase 42V.

[0099] In addition, the short coil 32 on the neutral point 44 side in the V phase 42V and the short coil 32 on the neutral point 44 side in the Z phase 42Z are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 on the neutral point 44 side in the X phase 42X is arranged so as to straddle the short coil 32 on the neutral point 44 side in the V phase 42V and the short coil 32 on the neutral point 44 side in the Z phase 42Z.

[0100] In addition, the short coil 32 on the neutral point 44 side in the Z phase 42Z and the short coil 32 on the opposite side of the neutral point 44 in the U phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 on the neutral point 44 side in the Y phase 42Y is arranged so as to straddle the short coil 32 on the neutral point 44 side in the Z phase 42Z and the short coil 32 on the opposite side of the neutral point 44 in the U phase 42U.

[0101] 26 and 27, in this embodiment, the combined resistance of the U-phase coil connection body 46U and the V-phase coil connection body 46V is R1. Furthermore, the combined resistance of the W-phase coil connection body 46W is R2. Because the U-phase coil connection body 46U and the V-phase coil connection body 46V are configured to include two short coils 32, and the W-phase coil connection body 46W is configured to include two long coils 34, the combined resistance R1 is smaller than the combined resistance R2.

[0102] The combined resistance of the X-phase coil connection body 46X and the Y-phase coil connection body 46Y is R3. The combined resistance of the Z-phase coil connection body 46Z is R4. The X-phase coil connection body 46X and the Y-phase coil connection body 46Y are configured to include two long coils 34, and the Z-phase coil connection body 46Z is configured to include two short coils 32, so the combined resistance R3 is greater than the combined resistance R4.

[0103] In the motor of the seventh embodiment, the numbers of short coils 32 and long coils 34 in each of the coil connection bodies 46U, 46V, 46W, 46X, 46Y, and 46Z are set so that the relationship R1:R2 = R4:R3 is satisfied. This prevents torque ripple from worsening. The relationship R1:R2 = R4:R3 means that the difference between R1 / R2 and R4 / R3 is within ±5%. The U-phase 42U, V-phase 42V, and W-phase 42W and the X-phase 42X, Y-phase 42Y, and Z-phase 42Z may be connected to and driven by separate three-phase inverters, or the U-phase 42U, V-phase 42V, and W-phase 42W and the X-phase 42X, Y-phase 42Y, and Z-phase 42Z may be connected to and driven by a single three-phase inverter.

[0104] (Motor of Eighth Embodiment) As shown in FIG. 28 , in the stator 14 of the motor 51 of the eighth embodiment, the multiple coils 16 are delta-connected. In this embodiment, the U-phase 42U, V-phase 42V, and W-phase 42W each include two short coils 32 and two long coils 34. The connection point between the U-phase coil connection body 46U and the V-phase coil connection body 46V is referred to as the UV connection point 52UV. The connection point between the V-phase coil connection body 46V and the W-phase coil connection body 46W is referred to as the VW connection point 52VW. The connection point between the W-phase coil connection body 46W and the U-phase coil connection body 46U is referred to as the WU connection point 52WU. The arrows i in FIG. 29 indicate the direction of current when a voltage is applied between the UV connection point 52UV and the VW connection point 52VW, and between the UV connection point 52UV and the WU connection point 52WU.

[0105] In the U-phase 42U, the four coils 16 are connected in series in the order of long coil 34, short coil 32, long coil 34, and short coil 32 from the WU connection point 52WU to the UV connection point 52UV. In the V-phase 42V, the four coils 16 are connected in series in the order of short coil 32, long coil 34, short coil 32, and long coil 34 from the UV connection point 52UV to the VW connection point 52VW. In the W-phase 42W, the four coils 16 are connected in series in the order of short coil 32, long coil 34, short coil 32, and long coil 34 from the VW connection point 52VW to the WU connection point 52WU. In the U-phase 42U, the range from the WU connection point 52WU to the UV connection point 52UV is the U-phase coil connection body 46U, in the V-phase 42V, the range from the UV connection point 52UV to the VW connection point 52VW is the V-phase coil connection body 46V, and in the W-phase 42W, the range from the VW connection point 52VW to the WU connection point 52WU is the W-phase coil connection body 46W. Also in this embodiment, the combined resistances of the coil connections 46U, 46V, 46W of each phase are the same.

[0106] 29, the short coil 32 on the WU connection point 52WU side in the U phase 42U and the short coil 32 on the VW connection point 52VW side in the W phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26. In addition, the long coil 34 on the VW connection point 52VW side in the V phase 42V is arranged so as to straddle the short coil 32 on the UV connection point 52UV side in the U phase 42U and the short coil 32 on the VW connection point 52VW side in the W phase 42W.

[0107] The short coil 32 on the VW connection point 52VW side in the W phase 42W and the short coil 32 on the UV connection point 52UV side in the V phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. The long coil 34 on the WU connection point 52WU side in the U phase 42U is arranged so as to straddle the short coil 32 on the VW connection point 52VW side in the W phase 42W and the short coil 32 on the UV connection point 52UV side in the V phase 42V.

[0108] Furthermore, the short coil 32 on the UV connection point 52UV side in the V phase 42V and the short coil 32 on the UV connection point 52UV side in the U phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 on the WU connection point 52WU side in the W phase 42W is arranged so as to straddle the short coil 32 on the UV connection point 52UV side in the V phase 42V and the short coil 32 on the UV connection point 52UV side in the U phase 42U.

[0109] Furthermore, the short coil 32 on the UV connection point 52UV side in the U phase 42U and the short coil 32 on the WU connection point 52WU side in the W phase 42W are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 on the VW connection point 52VW side in the V phase 42V is arranged so as to straddle the short coil 32 on the UV connection point 52UV side in the U phase 42U and the short coil 32 on the WU connection point 52WU side in the W phase 42W.

[0110] The short coil 32 on the WU connection point 52WU side in the W phase 42W and the short coil 32 on the VW connection point 52VW side in the V phase 42V are arranged adjacent to each other in the circumferential direction along the stator core 26. The long coil 34 on the UV connection point 52UV side in the U phase 42U is arranged so as to straddle the short coil 32 on the WU connection point 52WU side in the W phase 42W and the short coil 32 on the VW connection point 52VW side in the V phase 42V.

[0111] Furthermore, the short coil 32 on the VW connection point 52VW side in the V-phase 42V and the short coil 32 on the WU connection point 52WU side in the U-phase 42U are arranged adjacent to each other in the circumferential direction along the stator core 26. Furthermore, the long coil 34 on the VW connection point 52VW side in the W-phase 42W is arranged so as to straddle the short coil 32 on the VW connection point 52VW side in the V-phase 42V and the short coil 32 on the WU connection point 52WU side in the U-phase 42U.

[0112] The motor 51 according to the eighth embodiment, which is configured to include the stator 14 described above, can also suppress deterioration of torque ripple.

[0113] (Motor of 9th embodiment) As shown in FIGS. 30 and 31 , the insulator 28 of the motor of the ninth embodiment includes a plurality of first circumferential positioning portions 28E serving as circumferential positioning portions for circumferentially positioning the short coils 32, and a plurality of second circumferential positioning portions 28F serving as circumferential positioning portions for circumferentially positioning the intermediate coil 48. The configurations of the first circumferential positioning portions 28E and the second circumferential positioning portions 28F are similar to the configuration of the aforementioned circumferential positioning portion 28D (see FIG. 13 ). The plurality of first circumferential positioning portions 28E are arranged at equal intervals in the circumferential direction along the shaft end surface covering portion 28B. The plurality of second circumferential positioning portions 28F are arranged at equal intervals in the circumferential direction at positions offset axially to one side from the plurality of first circumferential positioning portions 28E. When viewed from one axial side, each of the plurality of second circumferential positioning portions 28F is arranged between a pair of circumferentially adjacent first circumferential positioning portions 28E.

[0114] The coil end portions 38 of the short coils 32 are positioned between a pair of circumferentially adjacent first circumferential positioning portions 28E, thereby positioning the short coils 32 in the circumferential direction. The coil end portions 38 of the medium coil 48 are positioned between a pair of circumferentially adjacent second circumferential positioning portions 28F, thereby positioning the medium coil 48 in the circumferential direction. When the coil end portions 38 of the medium coil 48 are positioned between a pair of circumferentially adjacent second circumferential positioning portions 28F, the coil end portions 38 of the medium coil 48 abut against the axial end surfaces of the first circumferential positioning portions 28E. This positions the medium coil 48 in the axial direction. In other words, the first circumferential positioning portions 28E function as first axial positioning portions 28G, which serve as axial positioning portions that position the medium coil 48 in the axial direction. Furthermore, when the long coil 34 is arranged along the stator core 26 via the insulator 28, the coil end portions 38 of the long coil 34 abut against the axial end faces of the second circumferential positioning portions 28F, thereby positioning the long coil 34 in the axial direction. In other words, the second circumferential positioning portions 28F serve as second axial positioning portions 28H that serve as axial positioning portions that position the long coil 34 in the axial direction.

[0115] In the motor of this embodiment described above, by providing the first circumferential positioning portion 28E (first axial positioning portion 28G) and the second circumferential positioning portion 28F (second axial positioning portion 28H), it is possible to improve the workability when attaching each coil 16 to the stator core 26 via the insulator 28.

[0116] (Motor of Tenth Embodiment) As shown in FIG. 32 , the motor 54 of the tenth embodiment is characterized in that the stator core 26 is provided with small protrusions 26A as inter-winding portions disposed between a pair of circumferentially adjacent opposing portions 36. Here, the circumferential width of the small protrusions 26A is Wt, the saturation magnetic flux density of the small protrusions 26A is Bs, the circumferential width of one magnetic pole of the magnet 18 is Wm, and the residual magnetic flux density of the magnetic compound forming the magnet 18 is Br. The small protrusions 26A are formed using a magnetic material or a non-magnetic material that satisfies the relationship Wt×Bs≦Wm×Br. This improves the magnetic flux density of the stator 14 and suppresses magnetic saturation and magnetic flux leakage, thereby improving the torque of the motor 54.

[0117] (Motor of eleventh embodiment) As shown in Fig. 33, in a motor 56 of the eleventh embodiment, the magnets 18 of the rotor 12 are formed using a magnetic compound having an intrinsic coercivity Hc of 400 kA / m or more and a residual magnetic flux density Br of 1.0 T or more. When viewed from the axial direction, the angle between the direction of the easy axis of magnetization 58 at the center of the magnetic pole of the magnet 18 and the radial direction (d-axis 60) is set to be smaller than the angle between the direction of the easy axis of magnetization 58 between the magnetic poles of the magnet 18 and the radial direction (q-axis 62). This increases the magnetic flux density in the air gap with the stator 14. As a result, the motor 56 can be made smaller and more powerful, and the amount of magnets 18 can be reduced.

[0118] (Motor of the twelfth embodiment, motor of the thirteenth embodiment) 34A, in a motor 64 of the twelfth embodiment, a portion of one circumferentially adjacent magnet 18 facing the coil 16 and a portion of another circumferentially adjacent magnet 18 facing the coil 16 are spaced apart in the circumferential direction. Also, an intervening portion 24D formed using a magnetic material is interposed between a portion of one circumferentially adjacent magnet 18 facing the opposite side to the coil 16 and a portion of another circumferentially adjacent magnet 18 facing the opposite side to the coil 16. The intervening portion 24D is formed integrally with the rotor core 24, for example.

[0119] 34B, in a motor 66 of the thirteenth embodiment, a portion of one circumferentially adjacent magnet 18 on the coil 16 side is circumferentially separated from a portion of another circumferentially adjacent magnet 18 on the coil 16 side. Also, a portion of one circumferentially adjacent magnet 18 on the opposite side to the coil 16 side is circumferentially abutting on another circumferentially adjacent magnet 18 on the opposite side to the coil 16 side, or is slightly separated from another circumferentially adjacent magnet 18 on the opposite side to the coil 16 side.

[0120] In the motor 64 of the twelfth embodiment and the motor 66 of the thirteenth embodiment configured as described above, the magnetic resistance between the magnets 18 adjacent to each other in the circumferential direction can be reduced and the magnetic flux density can be increased.

[0121] (Motor of 14th embodiment) As shown in FIG. 35 , a motor 68 of the fourteenth embodiment is a motor with a reducer 70. Most of the reducer 70 is disposed inside the rotor core 24. The reducer 70 includes an internal gear 72 fixed to the rotary shaft 22 and an external gear 76 disposed radially outward of the internal gear 72 and fixed to a housing 74 that supports the stator 14. The reducer 70 also includes a planetary gear 78 disposed between the internal gear 72 and the external gear 76 and meshing with the internal gear 72 and the external gear 76, a carrier 80 that supports the planetary gear 78, and an output shaft 82 fixed to the carrier 80. In the motor 68 with this configuration, the rotation of the rotor 12 can be reduced in speed by the reducer 70 and transmitted to the output shaft 82.

[0122] (Motor of the 15th embodiment and the 16th embodiment) 36 and 37, a motor 84 of the fifteenth embodiment and a motor 86 of the sixteenth embodiment are formed using the same short coils 32 and long coils 34. In this case, by adjusting the circumferential length of the stator core 26, for example, it is possible to manufacture a plurality of types of motors 84, 86 with different outputs and sizes using the same short coils 32 and long coils 34.

[0123] The configurations of the motor 10 and other components of the above-described embodiments can be combined with each other. This combination can be determined appropriately taking into consideration the output and size required of the motor. Furthermore, the configurations of the motor 10 and other components of the above-described embodiments can be applied not only to inner rotor motors but also to outer rotor motors.

[0124] Furthermore, in the above-described example, the pair of coil end portions 38 of the coil 16 are bent at approximately right angles toward the axial end face of the stator core 26, but the present invention is not limited to this. For example, in the example shown in Fig. 38, the coil end portion 38 on one axial side of the short coil 32 is bent at approximately right angles toward the axial end face of the stator core 26, and the coil end portion 38 on the other axial side is bent at approximately right angles away from the stator core 26. Also, the coil end portion 38 on one axial side of the long coil 34 is bent at approximately right angles toward the axial end face of the stator core 26, and the coil end portion 38 on the other axial side is bent at approximately right angles away from the stator core 26. In the example shown in Fig. 39, the coil end portion 38 on one axial side of the short coil 32 is bent at approximately right angles toward the axial end face of the stator core 26, and the coil end portion 38 on the other axial side is not bent. Furthermore, the coil end portions 38 on one axial side of the long coil 34 are not bent, and the coil end portions 38 on the other axial side are bent at approximately right angles away from the stator core 26. In this example, the terminal portions 40 of the coil 16 are inclined with respect to the axial direction. In the example shown in FIG. 40, the pair of coil end portions 38 of the short coil 32 are bent at approximately right angles toward the axial end face of the stator core 26, and the pair of coil end portions 38 of the long coil 34 are not bent. In the example shown in FIG. 41, the pair of coil end portions 38 of the short coil 32 are bent at an incline with respect to the axial direction toward the axial end face of the stator core 26, and the pair of coil end portions 38 of the long coil 34 are bent at an incline with respect to the axial direction toward the axial end face of the stator core 26. In this way, whether or not the pair of coil end portions 38 of the coil 16 are bent, as well as the bending direction and bending angle, can be determined appropriately taking into account the required physical size of the motor, etc. 42, it is preferable to configure the magnet 18 so that its end on one axial side and its end on the other axial side are disposed radially opposite the coil end portion 38 on one axial side and the coil end portion 38 on the other axial side, respectively, thereby achieving a high output and a compact motor.43, the coil end portion 38 on one axial side and the coil end portion 38 on the other axial side of one coil 16 are not bent. Also, the boundary between the opposing portion 36 of the other coil 16 and the coil end portion 38 on one axial side is bent toward the axial end face of the stator core 26, and the boundary between the opposing portion 36 of the other coil 16 and the coil end portion 38 on the other axial side is bent toward the axial end face of the stator core 26. As a result, the coil end portion 38 on one axial side of the one coil 16 and the coil end portion 38 on one axial side of the other coil 16 are arranged to overlap in the radial direction, and the coil end portion 38 on the other axial side of the one coil 16 and the coil end portion 38 on the other axial side of the other coil 16 are arranged to overlap in the radial direction. With this configuration, it is not necessary to arrange the coil end portion 38 of one coil 16 along the axial end face of the stator core 26, and the coil end portions 38 of the other coils 16 that are arranged along the axial end face of the stator core 26 are reduced. This allows the stator core 26 to be thinner in the radial direction. Also, in the example shown in FIG. 44 , the coil end portion 38 on one axial side of one coil 16 is bent toward the axial end face of the stator core 26, while the coil end portion 38 on the other axial side of the one coil 16 is not bent. On the other hand, the coil end portion 38 on one axial side of the other coil 16 is not bent, while the coil end portion 38 on the other axial side of the other coil 16 is bent away from the stator core 26. As a result, the coil end portion 38 on one axial side of one coil 16 and the coil end portion 38 on one axial side of another coil 16 are arranged to overlap in the radial direction, and the coil end portion 38 on the other axial side of one coil 16 and the coil end portion 38 on the other axial side of another coil 16 are arranged to overlap in the radial direction. In this configuration, after one coil 16 is arranged along the stator core 26, the other coil 16 can be arranged along the stator core 26 by moving the other coil 16 in the axial direction.

[0125] 45, the winding 30 forming the coil 16 may be configured from two winding configurations 88 stacked in the second direction (the direction of arrow A2). Furthermore, as shown in FIG. 46, the winding 30 forming the coil 16 may be configured from two winding configurations 88 stacked in the first direction (the direction of arrow A1). Furthermore, as shown in FIG. 47, the winding 30 forming the coil 16 may be configured from four winding configurations 88 stacked in the first and second directions.

[0126] In the above-described embodiments, the configuration has been described in which the side on which the magnet 18 is provided is the rotor 12 (rotor) and the side on which the coil 16 is provided is the stator 14 (stationary element), but the configuration of the present disclosure can also be applied to a configuration in which the side on which the coil 16 is provided is the rotor 12 (rotor) and the side on which the magnet 18 is provided is the stator 14 (stationary element). Needless to say, the configuration of the present disclosure can also be applied to a generator in which the rotor (rotor) is rotated by an external force.

[0127] The above describes one embodiment of the present disclosure, but the present disclosure is not limited to the above, and it goes without saying that it can be implemented in various other modified forms within the scope that does not deviate from the gist of the present disclosure. [Explanation of symbols]

[0128] 10 motor, 12 rotor (rotating body), 16 coil, 18 magnet, 24D interposition portion, 26 stator core (core), 26A small protrusion (inter-winding portion), 28 insulator, 28E first circumferential positioning portion (circumferential positioning portion), 28F second circumferential positioning portion (circumferential positioning portion), 28G first axial positioning portion (axial positioning portion), 28H second axial positioning portion (axial positioning portion), 30 winding, 36 opposing portion, 38 coil end portion, 46U coil connection body, 46V coil connection body, 46W coil connection body, 46U coil connection body, 46V coil connection body, 46W coil connection body, 50 motor, 51 motor, 54 motor, 56 motor, 58 easy axis of magnetization, 64 motor, 66 motor, 68 motor, A1 first direction, A2 Second direction, 70 reducer, 84 motor, 86 motor

Claims

1. a rotating body (12) having a magnet (18) and rotatably supported; a core (26) formed in an annular shape and arranged coaxially with the rotor; a coil connection body (46U) of one phase having a plurality of coils (16) each formed by winding a conductive winding (30) in an annular shape and connected to one another, at least one of the plurality of coils having an electrical resistance set to be different from the electrical resistance of the other coils, the plurality of coils being arranged facing the magnet and along the core; a coil connection body (46V, 46W) of another phase, which has a plurality of coils each formed by winding a conductive wire in a circular shape and connected to one another, and at least one of the plurality of coils has an electrical resistance set to be different from the electrical resistance of the other coils, the plurality of coils being arranged facing the magnet and along the core, and having a combined resistance set to be the same as that of the coil connection body of the one phase; Equipped with The coil has an opposing portion (36) in which the windings are arranged side by side in the circumferential direction and which is arranged radially opposite the axial center of the magnet, and coil end portions (38) which respectively form portions on one and the other axial sides of the opposing portion, The coil end portion of one of the coils and the coil end portion of the other of the coils, which have different electrical resistances from each other, are arranged to overlap each other, An insulator (28) is attached to the core to separate the core from the plurality of coils; The insulator includes an inner surface covering portion (28A) covering a radially inner surface of the core, a pair of axial end surface covering portions (28B) covering both axial end surfaces of the core, and a pair of outer peripheral flange portions (28C) extending in the axial direction from radially outer ends of the pair of axial end surface covering portions, Each of the outer flange portions is provided with a circumferential positioning portion (28E, 28F) that is formed in a convex shape toward the inside in the radial direction and that positions one of the plurality of coils in the circumferential direction by contacting a coil end portion of the one of the plurality of coils in the circumferential direction, and an axial positioning portion (28G, 28H) that is formed in a convex shape toward the inside in the radial direction and that positions another of the plurality of coils in the axial direction by contacting a coil end portion of the other of the plurality of coils in the axial direction. Motors (10, 50, 51, 54, 56, 64, 66, 68, 84, 86).

2. In a cross-sectional view of the winding cut along a plane perpendicular to the axial direction at a portion extending in the axial direction, the dimension in a first direction (A1), which is the vertical direction of the cross section of the winding, is set to be larger than the dimension in a second direction (A2), which is the horizontal direction of the cross section of the winding; The motor according to claim 1 , wherein the first direction of the winding in the facing portion faces the magnet.

3. The coil is formed by winding the windings in a stacked state in the second direction, and the windings stacked in the second direction are inseparably bonded in the second direction, 3. The motor according to claim 2, wherein the boundary between at least one of the coil end portions and the opposing portion is bent in the first direction, so that at least one of the coil end portions is arranged along the axial end face of the core.

4. A motor described in any one of claims 1 to 3, wherein, when viewed from the axial direction, the opposing portion is curved along the radially inner surface or the radially outer surface of the core.

5. A pair of terminal portions of the coil are arranged on one side in the axial direction, The motor according to any one of claims 1 to 4, wherein the number of laminations of the windings in the coil end portion on one axial side is smaller than the number of laminations of the windings in the coil end portion on the other axial side.

6. A motor described in any one of claims 1 to 5, wherein the end portion on one axial side and the end portion on the other axial side of the magnet are arranged radially opposite the coil end portion on one axial side and the coil end portion on the other axial side, respectively.

7. The core has an inter-winding portion (26A) arranged between one of the coils and another of the coils, The motor according to any one of claims 1 to 6, wherein the inter-winding portion is formed using a magnetic material or a non-magnetic material that satisfies the relationship Wt × Bs ≦ Wm × Br, where Wt is the circumferential width dimension of the inter-winding portion, Bs is the saturation magnetic flux density of the inter-winding portion, Wm is the circumferential width dimension of one magnetic pole of the magnet, and Br is the residual magnetic flux density of the magnetic compound that forms the magnet.

8. The magnet is formed using a magnetic compound having an intrinsic coercivity Hc of 400 [kA / m] or more and a residual magnetic flux density Br of 1.0 [T] or more; A motor according to any one of claims 1 to 7, wherein, when viewed in the axial direction, the angle between the direction of the easy axis of magnetization (58) at the center of the magnetic pole of the magnet and the radial direction is set to be smaller than the angle between the direction of the easy axis of magnetization between the magnetic poles of the magnet and the radial direction.

9. A plurality of the magnets are arranged in a circumferential direction, a portion of one of the magnets adjacent to the coil side and a portion of the other of the magnets adjacent to the coil side are spaced apart in the circumferential direction, A motor as described in any one of claims 1 to 8, wherein a portion of one of the magnets opposite the coil that is adjacent in the circumferential direction abuts against a portion of the other of the magnets opposite the coil in the circumferential direction, or an intervening portion (24D) formed using a magnetic material is interposed between a portion of one of the magnets opposite the coil that is adjacent in the circumferential direction and a portion of the other of the magnets opposite the coil.

10. A motor described in any one of claims 1 to 9, in which a reducer (70) for slowing down the rotation of the rotating body is provided radially inside the rotating body.

11. The coil connection body of one phase is configured to include the coil formed by a winding of a first length and the coil formed by a winding of a second length longer than the first length, the coil connection body of the other phase includes the coil formed by the winding of the first length and the coil formed by the winding of the second length, the opposing portions of all the coils are disposed at the same radial position, the coil end portion of the coil formed by the winding of the first length and the coil end portion of the coil formed by the winding of the second length are arranged to overlap in the axial direction, The motor according to any one of claims 1 to 10, wherein the coil end portion of the coil formed by the winding of the second length is positioned on the opposite side of the core from the coil end portion of the coil formed by the winding of the first length.

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